Door-check



Patented Aug. 16, I898.

N. SHAW.

000B CHECK.

(Application filed Feb. 16, 1898.)

(No Model.

rlJ

[M52710]?- m QSZ-W WITNESSES.- %N b! l UNTTED STATES PATENT EETEE,

NELSON SHAW, or nousnronro, MASSACHUSETTS.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 609,214, dated August16,1898. Application filed February 16, 1898. Serial No. $70,542: (N0model.)

ful Improvements in Door-Checks; and I do declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form a part of thisspecification.

This invention has relation to improvements in devices for limiting theopening in doors; and it consists in the novel construction,combination, and arrangements of parts of which it is composed, all aswill be hereinafter fully explained.

The annexed drawings,to which reference is 1nade,fully illustrate myinvention,in which- Figure 1 represents a front or face view of mydevice. Fig. 2 is a horizontal sectional View of the same, and Figs. 3and 4: are detail views.

Referring by letter to the accompanying drawings, A designates a portionof an ordinary door, and a is a portion of thejamb.

To the door A, near the edge thereof, is secured a plate I), having agroove c and lugs or ears d d at or near the outer end. Within thisgroove 0 is arranged a fiat spring e,which is secured to said plate atf, while the free end 9 has its bearing upon the cam h, formed upon theend i of the sectional arm j, which end is pivoted at 70 to the lugs orears d d of the plate I). This cam has a depressed portion Z, in whichthe free end of the spring drops when the arm is folded back and not inuse. This arm, which limits the space between the jamb and door, iscomposed of two sections on m which are hin ed to one an-j 7 23 other atn, and the section this provided with a spring 0, secured at p tosaid'section, while the free end q engages a notch or shoulder r in thesection on, which spring holds the two sections in an extended position,presenting one arm, and at the same time the section m" can be foldedupon the section m, if desired.

The free end of the locking-arm, asat s, is provided with rollers t t oneither side,which travel back and forth in the box to on the plate 1),which is secured to the jamb. The forward end of the arm travels in aslot w,which is closed at one end so and open at y at the opposite end,having a flaring mouth 2, in which the rollers enter and leave the box.

This slotted box has inwardly-projecting flanges, between which and thebodyof the plate the rollers move when the dooris opened or closed, andahandle a is secured to the end of the arm.

The lugs 01 d are cut away at b b, which curved portion thereof receivesthe free end of the arm when in a folded position, and thus retains thesame in place when the device is not in use.

It will thus be seen that when the door is opened and the arm isconnected to the boxplate on the jamb the door can be opened to alimited degree, and thus prevent undesirable persons entrance to thedwelling,when conversation can be had through the limited opening; butwhen it is desired to open the door wide and when not using the devicethe sectional arm is disengaged from the boxplate and folded back uponitself, where it is retained by the pressure of the end of the flatspring upon the depressed portion of the cam. Said spring at all timeshas a pressure upon the arm, and when the arm is connected to thebox-plate the pressure keeps the rollers upon theplate in the box, and adevice as herein described is durable, not liable to get out of order,and at the same time cheap to manufacture.

Having thus described my invention, what I claim, and desire to secureby Letters Patcut, is

1. The combination with the doorplate having the lugs,'and the box-platehaving the slot and flanges, of the locking-arm,composed of twosections, and the fiat spring, said arm pivoted to the lugsand providedwith the cam and depression, on which the free end of the spring e,presses and the section m, having the notch, the spring secured to thesection m; the hooked end thereof engaging said notch and the rollersjournaled to the end of the section m, all substantially as described.p,

2. Ina door-checking device of the character herein described thecombination of the box-plate, having the slotand inner flanges andflaring mouth, the plate secured to the In testimony whereof I aflix mysignature door having lugs, one side of said lugs being in presence oftwo Witnesses. cut aWa to receive the end of the arm when in its fo lded positi0n,the arm composed of NELSON SHAVV' 5 sections, theholding-spring and the spring Witnesses:

connecting the two sections When the arm is WALTER B. SANFORD, extended,substantially as described. LUDGER VILON.

